Pulley STEM Project Worksheet

Science experiments lesson 25: Thread-reel pulley · Set 831 · 40 questions

What you do (Pull down, lift up): 1. Push the pencil through the thread reel; an adult holds the pencil ends level. 2. Tie the paper cup to one end of the string and lay the string over the reel. 3. Put coins in the cup and pull the other end down. 4. Feel how hard you pull; never stand under the load or wrap string round your fingers.

1. 1.🔮 With a moving pulley, to lift the cup 10 cm you must pull the string about ___. (a) 40 cm (b) 5 cm (c) 10 cm (d) 20 cm
2. 2.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the lifting height”? (a) we change it (b) we measure it (c) we keep it the same
3. 3.🧺 Which of these is needed for the thread-reel pulley? (a) an empty thread reel (b) a magnet (c) yeast (d) a balloon
4. 4.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is kept the same? (a) the same cup of coins (b) how hard we must pull (c) number of pulleys
5. 5.True or false: string is not needed for the thread-reel pulley. (a) True (b) False
6. 6.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “the same string”? (a) we change it (b) we measure it (c) we keep it the same
7. 7.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) coins as the load (b) turmeric powder (c) a small paper cup (d) string
8. 8.True or false: a mirror is needed for the thread-reel pulley. (a) True (b) False
9. 9.🔮 Predict: you add a moving pulley that holds the cup. The pull needed becomes ___. (a) zero (b) double (c) the same (d) about half
10. 10.🧺 Do we need a battery cell for the thread-reel pulley? (a) not needed (b) needed
11. 11.True or false: a flagpole uses a pulley. (a) False (b) True
12. 12.True or false: a magnet is needed for the thread-reel pulley. (a) False (b) True
13. 13.📘 A pulley is a wheel with a groove for a ___. (a) battery (b) rope (c) nail (d) magnet
14. 14.🔮 Predict: you add more coins to the cup. Pulling it up gets ___. (a) harder (b) impossible (c) the same (d) easier
15. 15.True or false: a pencil is needed for the thread-reel pulley. (a) False (b) True
16. 16.🧺 Do we need turmeric powder for the thread-reel pulley? (a) needed (b) not needed
17. 17.⚖️ Fair test — is lifting the cup easier with one pulley or with two? Which of these is the one thing we change? (a) the lifting height (b) number of pulleys (c) the same string (d) how hard we must pull
18. 18.⚙️ Which of these is a lever? (a) a sloping road (b) a slide (c) a doorknob (d) a see-saw
19. 19.🧺 Do we need string for the thread-reel pulley? (a) needed (b) not needed
20. 20.🏗️ With one fixed pulley, which way do you pull the string to lift the cup? (a) up (b) down (c) in a circle (d) sideways
21. 21.🧺 Which of these is not needed for the thread-reel pulley? (a) string (b) a magnet (c) an empty thread reel (d) a pencil
22. 22.🏗️ What does a single fixed pulley mainly do? (a) halves the weight (b) adds weight (c) makes it magnetic (d) changes pull direction
23. 23.⚖️ Fair test — is lifting the cup easier with one pulley or with two? True or false: the same string is what we measure. (a) False (b) True
24. 24.True or false: a bottle opener is a lever. (a) True (b) False
25. 25.🛟 Why should you never stand under a load being lifted? (a) it might sing (b) it gets hot (c) it is magnetic (d) it could fall on you
26. 26.⚙️ Which simple machine is a flagpole? (a) a lever (b) a wheel and axle (c) an inclined plane (d) a pulley
27. 27.🛟 Why should you not wrap the string around your finger? (a) it can hurt your finger (b) it gets wet (c) it gets longer (d) it turns blue
28. 28.⚙️ Which simple machine is a sloping road? (a) an inclined plane (b) a pulley (c) a wheel and axle (d) a lever
29. 29.🇮🇳 Where do we see a pulley at school on Independence Day? (a) on the bench (b) on the flagpole (c) in the tap (d) on the blackboard
30. 30.True or false: a steering wheel is a lever. (a) False (b) True
31. 31.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a pencil (b) a small paper cup (c) coins as the load (d) a battery cell
32. 32.⚙️ Which simple machine is a crane? (a) a pulley (b) a lever (c) a wheel and axle (d) an inclined plane
33. 33.🏗️ Why is a pulley used to lift water from a deep well? (a) the bucket floats (b) the rope gets shorter (c) pulling down is easier (d) water gets lighter
34. 34.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “how hard we must pull”? (a) we keep it the same (b) we change it (c) we measure it
35. 35.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) an empty thread reel (b) a pencil (c) coins as the load (d) a magnet
36. 36.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) string (b) coins as the load (c) a pencil (d) yeast
37. 37.🧺 Three of these are needed for the thread-reel pulley. Which one is NOT needed? (a) a small paper cup (b) coins as the load (c) an empty thread reel (d) a balloon
38. 38.⚖️ Fair test — is lifting the cup easier with one pulley or with two? What do we do with “number of pulleys”? (a) we measure it (b) we change it (c) we keep it the same
39. 39.True or false: a well pulley uses a pulley. (a) False (b) True
40. 40.🧺 Which of these is needed for the thread-reel pulley? (a) a pencil (b) a battery cell (c) a mirror (d) yeast

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